For herniated lumbar discs, you should visit either the Department of Spine Surgery or Orthopedics. The specific department depends on the hospital you choose to visit. If the hospital is a high-level institution, grade three or above, it will certainly have a Department of Spine Surgery, so this would be the first choice. However, if the hospital is a community clinic or a second-tier hospital, it might not have a Spine Surgery department, so you would need to visit the general Orthopedics department. Although herniated lumbar discs are a common orthopedic condition and can be treated in Orthopedics, visiting a specialist in Spine Surgery can often provide more expert care as these doctors may have higher levels of experience and expertise in treatment.